<script lang="ts" name="TopCategory" setup>
import GoodsItem from './components/goods-item.vue'
import { ref, watch, watchEffect } from 'vue';
import { useRoute } from 'vue-router'
import useStore from '../../store';
import { storeToRefs } from 'pinia';

const { home } = useStore()

const route = useRoute()
const { category } = useStore()
// 由于路由切换，组件没有换，还是同一个分类组件，只是根据不同的id渲染不同的分类
// setup 只会执行一次，就应该监听路由的变化，路由只要变了，就应该发送请求
// watch(() => route.params.id, (newVal) => {
//     if (!newVal) return
//     category.getTopCategory(route.params.id as string)
// }, { immediate: true })

watchEffect(() => {
    // 如果用到的数据，确实都需要依赖，依赖了就要变化 => watchEffect
    // 有参数才发请求，没有参数直接 return 
    if (!route.params.id) return
    // 这个请求，只在一级类目，去发 
    if (route.fullPath !== `/category/${route.params.id}`) return
    // 获取一级分类的数据 (渲染面包屑等)
    category.getTopCategory(route.params.id as string)
    // 获取展示的轮播图数据
    home.getBannerList()
})

// const money = ref(0)
// const score = ref(100)
// 上面这个，想要监听谁，就监听谁
// watch([money, score], (newValues) => {
//     // 一旦money变化，就立刻打印
//     console.log(newValues)
// })

// 用到了什么数据，就会自动监视什么数据，且一进入页面会触发一次
// watchEffect(() => {
//     console.log(money.value, score.value)
// })

const { topCategory } = storeToRefs(category)

</script>
<template>
    <div class="top-category">
        <div class="container">
            <XtxBread>
                <XtxBreadItem to="/">首页</XtxBreadItem>
                <XtxBreadItem>{{ category.topCategory.name }}</XtxBreadItem>
            </XtxBread>
            <XtxCarousel :slides="home.bannerList" style="height: 500px;" autoplay></XtxCarousel>

            <!-- 所有二级分类 -->
            <div class="sub-list">
                <h3>全部分类</h3>
                <ul>
                    <li v-for="item in topCategory.children" :key="item.id">
                        <RouterLink :to="`/category/sub/${item.id}`">
                            <img v-lazy="item.picture">
                            <p>{{ item.name }}</p>
                        </RouterLink>

                    </li>
                </ul> 
            </div>

            <!-- 商品列表 -->
            <!-- 分类关联商品 -->
            <div class="ref-goods" v-for="item in topCategory.children" :key="item.id">
                <div class="head">
                    <h3>- {{ item.name }} -</h3>
                    <p class="tag">温暖柔软，品质之选</p>
                    <XtxMore />
                </div>
                <div class="body">
                    <GoodsItem :goods="obj" v-for="obj in item.goods" :key="obj.id" />
                </div>
            </div>
        </div>
    </div>
</template>



<style scoped lang="less">
.top-category {
    h3 {
        font-size: 28px;
        color: #666;
        font-weight: normal;
        text-align: center;
        line-height: 100px;
    }

    .sub-list {
        margin-top: 20px;
        background-color: #fff;

        ul {
            display: flex;
            padding: 0 32px;
            flex-wrap: wrap;

            li {
                width: 168px;
                height: 160px;

                a {
                    text-align: center;
                    display: block;
                    font-size: 16px;

                    img {
                        width: 100px;
                        height: 100px;
                    }

                    p {
                        line-height: 40px;
                    }

                    &:hover {
                        color: @xtxColor;
                    }
                }
            }
        }
    }
}

.ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;

    .head {
        .xtx-more {
            position: absolute;
            top: 20px;
            right: 20px;
        }

        .tag {
            text-align: center;
            color: #999;
            font-size: 20px;
            position: relative;
            top: -20px;
        }
    }

    .body {
        display: flex;
        justify-content: flex-start;
        flex-wrap: wrap;
        padding: 0 65px 30px;
    }
}
</style>